Update Sources Now
No followers yet.
Dipity
Chadwick was a british physicist who demonstrated that the nucleus of that atom also contains a nuetral partical called the neutrons and has nearly the same mass as a proton.
Helped increse our modern knowledge of the atom. Helped with the Manhattan project (the first atomic bomb).
Rutherford in past expirements determines that inside the nucleus of the atom exist a proton that has a charge of +1.
Robert Millikin was an American physicist who determined that the charge of an electron was -1 and the mass of an electron is 1/1840, the mass of a hydrogen atom.
J.J. Thompson the discoverer of the electron states the theory of the atom that electrons are negetively charged "plums" in a positively charged "pudding". Therefore the atom was neutral.
Discoverer of a mysteryious, powerful type of radiation called X-rays. These powerful rays of energy can pass through any materials. (The first medical x-ray machine was used in 1896.)
Thompson was a British physicist who discovered that the "cathode rays" were really negatively charged particles , smaller than an atom, which he than named electrons.
Crookes developed the ray tube, which was further named as "Crookes Tube" in which "rays" were discovered. When the tubes were connected and a voltage was used these "rays" could be seen flowing ac...
New Zealander who leaded the "gold foil experiment" disproved the plum pudding model of the atom but proved that the atom must have a small positively charged nucleus and the rest of the atom was m...
A polish scientist who won two nobel prizes (one in physics and one in chemistry) and that is a record tht still stands today. She was the first to use the word "radiation" to describe the strange ...
John Dalton was a school teacher who developed the modern atomic theory by experimentation that all matter is made of atoms, atoms of a particular element are all the same size, mass and chemical p...
Lavoiser is considered the "Father of modern chemistry" because he developed the Law of Conservation of Mass. Also he named Oxygen and Hydrogen, the metric system, an created the the first list of ...
The Alchemist were attempting to turn the pure elements into gold but never fully succeeded. However, Jabir ibn Hayyan helped establish experimental design in chemistry.
Democritus was the first person to state the that matter was made up of tiny particles and recognized these particles could not be destroyed or split.
Aristotle proposed matter was made from air, fire, water, or the Earth. He was proved wrong and it was found that Democritus was correct.
Comments